sohinke



3 Sheets-Sheet 1.

(No Model.)

0. SOHINKE. VALVE GEAR FOR STEAM ENGINES.

Patented July 3, 1883.

(No Model.) 3 Sheets-Sheet 2.

O. SGHI'NKE.

VALVE-GEAR FOB. STEAM ENGINES. No. 280,672. Patented. July 3, 1883.

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(No Model.) 3-Sheets-Sheet 3.

O. SOHINKE.

VALVE GEAR FOR STEAM ENGINES. No. 280,672. Patented July 3, 1883.

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I Z zzi/@ I I o A die-9d, Inveza $01 UNITED STATES PATENT OFFICE.

CARL SOHINKE, OF sr. LOUIS, MISSOURI, ASSIGNOB To THE ST. Louis IRON AND MACHINE WORKS, or SAME PLACE.

VALVE-GEAR FOR STEAM-ENGINES.

SPECIFICATION formingpart of Letters Patent No. 280,672, dated July 3, 1883.

Application filed March 26, i883: (No model.)

To aZZ whom it may concern.-

Be it known that I, CARL SCHINKE, of St. Louis, Missouri, have made a new and useful Improvement in Valve-Gear for Steam-Engines, of which the following is a full, clear, and exact description, reference being had to the annexed drawings, making part of this specification, in which Figure 1 is a side elevation of an engine having the improvement; Fig. 2, a view in perspective of the cam and parts immediately therewith connected; Fig. 3, another perspective view of the parts shown in Fig. 2; Fig. 4, a vertical section of the valve-chest, the valve about to open; Fig. 5, a section of the valvechest, the valve being as when the governorarm is in the position of Fig. 7 Fig. 6, a side elevation, showing the position of the eccentric when the crank is on the dead-center; Fig. 7,

a similar elevation, but the governor-arm being raised; Fig. 8, a similar elevation, the eccentric being turned around one-quarter of a revolution, the governor-arm being at the center of its movement; Fig. 9, a similar elevation, the eccentric being turnecharound onehalf a revolution, the governor-arm being in the same position as in Fig. 8.

The same letters of reference denote the same parts.

The present invention relates to the valvegear of the engine.

A represents a steam-engine in which the improvement is embodied.

A represents the enginecylinder, and A the main shaft.

B represents an eccentric fastened to the main shaft, and B the eccentric-strap. The strap has two levers, O O, jointed to it at c 0,

respectively. These levers in turn are connected by the link D, the link being jointed at its ends to the levers. The levers thus connected can be moved together upon the bearings c c, and as indicated by the positions shown in Figs. 6, 7, 8, 9, respectively.

E represents the valve-rod for operating the live-steam valves. It is at one end jointed to the link D and at the other end to the rod E, which rod in turn is jointed to the crank F.

The links G G connect the crank F with the cranks H H, respectively, of the valve-shafts jointed to the governor-valve stem m.

line of the throw, as in Figs. 6, 8, 9.

I 1, respectively. The reciprocation of the rod E therefore causes the shafts I I to rotate reciprocatingly and to open and close the circular valves .7 J, Figs. 4, 5, accordingly.

The invention has especial relation to the means described for connecting the eccentric and valve-rod.

K represents a rod leading from the link D and valve-rod E to a lever, L, connected with the governor M, the lever L being pivoted at Zto the governor-standard m, and at Z being The movement of the valve-stemm therefore causes the link Dand the parts thereto joined to be lifted and lowered, as-shown in the various positions of Figs. 6, 7, S, 9. \Vhen the parts have been thus lifted so as to bring the valverod E in line' with the throw of the eccentric, as in Fig. 7, the movement of the valves J J is less than when the valve-rod is below the In the last-named case the valves cut off later than in the first-named case; but when the speed of the engine increases, the governor acts to lift the valve-rod toward the governor, and the valves cut off later.

To keep the eccentric-strap suitably in place, and at the same time provide for alimited vibration of the eccentric strap-upon the main shaft, an arm, N, is journaled at its lower end to a fixed bearing, a, and at its upper end the arm is jointed to the eccentric-strap at n, Figs. 2, 3. The diaphragm yields sufficiently to the steam-pressure to balance. the valve, and the knife-edge enables the valve to be moved with little or no friction.

The rod B, which is jointed to the eccentricstrap, is for operating the exhaust-valves. (Not shown.)

I claim 7 9o 1. The combination of the shaft A", the eccentric B, the strap B, the levers C C, the link D, the rod E E, the crank F, the links G G, the cranks H H, and the valves J J, substantially as described. 5

2. The combination of the shaft A the eccentric B, the strap B, the levers O O, the link D, and the valve-rod E, substantially as described.

3. The combination of the shaft A", the ec- 10o centric B, the strap 13, the levers (l C, the I J J, substantially as described, and for the link 1), the valve-rod E, the rod K, the lever purpose set forth. IO L, and the governor 'M, substantially as de- \Vitness myhand this 16th January, 1883. scribed. 11 a l l T 7 4. The combination of the shaft A", the 00- bun} 1X19 centric B, the strap B, the lovers G .1, the \Vitnesses: link D the VQIYGJIOLI E the rod K, the lever (l. I). MOODY, L, the governor M, the arm N, and the valves SAML. S. BOYD. 

